A high-transmittance white ceramic product and preparation method thereof

Abstract

The present invention discloses a highly transparent white ceramic product and its preparation method, belonging to the field of ceramic technology. The highly transparent white ceramic product of the present invention comprises a green body and a highly transparent white glaze attached to its surface. The highly transparent white glaze comprises the following components: Longyan kaolin, coal gangue, talc, silica, diatomaceous earth, sepiolite, cryolite, yttrium oxide, potassium feldspar, a polyether-modified polydimethylsiloxane solution, and a glaze additive. The resulting highly transparent white ceramic product exhibits a high gloss and a highly transparent visual effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of ceramics, and in particular relates to a high-transmittance white ceramic product and a preparation method thereof. Background Art

[0002] Ceramic products have always been one of our specialty products, and Dehua, as one of the ceramic manufacturing areas, is famous for its white porcelain and other specialty ceramics.

[0003] The glaze of white porcelain has the characteristics of "dense porcelain, pure white body and glaze, seamless, clean and smooth, like fat and jade, and crystal clear as a whole". The visual appearance of white porcelain produced by different companies is also different. Our company is committed to developing a highly transparent white ceramic product with a clean glaze, high gloss and flawless ceramic products. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a highly transparent white ceramic product with a clean glaze, high gloss and no defects.

[0005] The present invention adopts the following technical solutions:

[0006] A high-transmittance white ceramic product comprises a green body and a high-transmittance white glaze attached to the surface of the green body. The high-transmittance white glaze comprises the following components in parts by mass: 51-63 parts of Longyan kaolin, 5-8 parts of coal gangue, 8-12 parts of talc, 12-14 parts of silicon dioxide, 16-18 parts of diatomaceous earth, 8-12 parts of sepiolite, 9-14 parts of cryolite, 6-9 parts of yttrium oxide, 12-16 parts of potassium feldspar, 11-12 parts of polyether-modified polydimethylsiloxane solution, and 5-7 parts of glaze additives.

[0007] Furthermore, the glaze additive includes the following components in parts by mass: 4 to 5 parts of phenol, 20 to 33 parts of water, and 11 to 13 parts of emulsifier.

[0008] The method for preparing the highly transparent white ceramic product comprises the following steps:

[0009] Step 1: Prepare high-transmittance white glaze

[0010] S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components;

[0011] S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material;

[0012] S3, crushing the obtained calcined material and sieving it to obtain a screen material;

[0013] S4, ball milling the obtained screen material to obtain ball mill material;

[0014] S5. Mixing the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and adding water to adjust the Baume degree to prepare a high-transparency white glaze;

[0015] Step 2: Glazing

[0016] Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product;

[0017] Step 3: Firing

[0018] The pre-fired product obtained in step 2 is fired and cooled to obtain a highly transparent white ceramic product.

[0019] Furthermore, the aging temperature in S1 is 35-40°C, and the aging time is 4-5 days.

[0020] Furthermore, the calcination temperature in S2 is 200-250° C., and the calcination time is 1-1.5 h.

[0021] Furthermore, in step S3, the sieve is passed through a 200-270 mesh screen; in step S4, the ball mill is performed using a water mill for 1-1.5 days; and in step S5, the Baume degree is adjusted to 43-45.

[0022] Furthermore, the firing process of step three is as follows:

[0023] In the firing kiln, fire at 320-400℃ for 1-1.5h, fire at 700-870℃ for 0.5-1h, fire at 1150-1200℃ for 2-2.5h, then fire at 1050-1100℃ for 10-20min, and finally cool naturally.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] First, the high-transmittance white ceramic product of the present invention includes a body and a high-transmittance white glaze attached to its surface. The high-transmittance white glaze uses Longyan kaolin as the glaze skeleton, BYK's polyether-modified polydimethylsiloxane solution as a leveling agent, and is combined with sepiolite with rheological properties to ensure the smoothness of the glaze surface and a more delicate touch of the glaze surface, thereby improving the white visual effect of the glaze surface.

[0026] Second, by mixing silica, diatomaceous earth, sepiolite, cryolite and yttrium oxide, and mixing cryolite with a melting effect and several other components, not only the whitening effect of the glaze is effectively improved, but also the strength of the glaze is improved.

[0027] Third, in order to improve the overall strength of ceramic products, the green body uses fibrous structures of anthophyllite and kaolinite, combined with calcined kaolin as the green body skeleton, and effectively improves the strength of the green body. DETAILED DESCRIPTION

[0028] The raw materials used in the present invention are all commercially available products, including:

[0029] Polyether-modified polydimethylsiloxane solution was purchased from BYK, Guangdong Huajie Chemical Co., Ltd.

[0030] The emulsifier was purchased from Dow Emulsifier OWFAX 2A1.

[0031] Example 1

[0032] A high-transmittance white ceramic product comprises a green body and a high-transmittance white glaze attached to the surface of the green body, wherein the high-transmittance white glaze comprises the following components in parts by mass: 51 parts of Longyan kaolin, 5 parts of coal gangue, 8 parts of talc, 12 parts of silicon dioxide, 16 parts of diatomaceous earth, 8 parts of sepiolite, 9 parts of cryolite, 6 parts of yttrium oxide, 12 parts of potassium feldspar, 11 parts of polyether-modified polydimethylsiloxane solution, and 5 parts of a glaze additive.

[0033] The glaze additive includes the following components in parts by mass: 4 parts of phenol, 20 parts of water, and 11 parts of emulsifier.

[0034] The method for preparing the highly transparent white ceramic product comprises the following steps:

[0035] Step 1: Prepare high-transmittance white glaze

[0036] S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components;

[0037] The aging temperature is 35°C and the aging time is 4 days;

[0038] S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material;

[0039] The calcination temperature is 200° C. and the calcination time is 1 h;

[0040] S3, crushing the obtained calcined material and sieving it to obtain a screen material;

[0041] When sieving, pass through a 200-mesh sieve;

[0042] S4, ball milling the obtained screen material to obtain ball-milled material; the ball milling is carried out by water milling, with a ratio of ball:water:material=1:1.1:1, and the ball milling time is 1 day;

[0043] S5. Mix the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and add water to adjust the Baume degree to 43 to obtain a high-transparency white glaze;

[0044] Step 2: Glazing

[0045] Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product;

[0046] Step 3: Firing

[0047] The pre-fired product obtained in step 2 is fired in a firing kiln at 320°C for 1 hour, 700°C for 0.5 hour, 1150°C for 2 hours, and then at 1050°C for 10 minutes. Finally, high-transmittance white ceramic products are obtained after natural cooling.

[0048] Example 2

[0049] A high-transmittance white ceramic product comprises a green body and a high-transmittance white glaze attached to the surface of the green body, wherein the high-transmittance white glaze comprises the following components in parts by mass: 63 parts of Longyan kaolin, 8 parts of coal gangue, 12 parts of talc, 14 parts of silicon dioxide, 18 parts of diatomaceous earth, 12 parts of sepiolite, 14 parts of cryolite, 9 parts of yttrium oxide, 16 parts of potassium feldspar, 12 parts of polyether-modified polydimethylsiloxane solution, and 7 parts of glaze additives.

[0050] The glaze additive includes the following components in parts by mass: 5 parts of phenol, 33 parts of water, and 13 parts of emulsifier.

[0051] The method for preparing the highly transparent white ceramic product comprises the following steps:

[0052] Step 1: Prepare high-transmittance white glaze

[0053] S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components;

[0054] The aging temperature is 40°C and the aging time is 5 days;

[0055] S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material;

[0056] The calcination temperature is 250° C. and the calcination time is 1.5 h;

[0057] S3, crushing the obtained calcined material and sieving it to obtain a screen material;

[0058] When sieving, pass through a 270-mesh sieve;

[0059] S4, ball milling the obtained screen material to obtain ball-milled material; the ball milling was carried out by water milling with a ratio of ball:water:material=1:1.2:1, and the ball milling time was 1.5 days;

[0060] S5. Mix the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and add water to adjust the Baume degree to 45 to obtain a high-transparency white glaze;

[0061] Step 2: Glazing

[0062] Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product;

[0063] Step 3: Firing

[0064] The pre-fired product obtained in step 2 is fired in a firing kiln at 400°C for 1.5 hours, 870°C for 1 hour, 1200°C for 2.5 hours, and then at 1100°C for 20 minutes. Finally, high-transmittance white ceramic products are obtained after natural cooling.

[0065] Example 3

[0066] A high-transmittance white ceramic product comprises a green body and a high-transmittance white glaze attached to the surface of the green body, wherein the high-transmittance white glaze comprises the following components in parts by mass: 54 parts of Longyan kaolin, 6 parts of coal gangue, 9 parts of talc, 11 parts of silicon dioxide, 17 parts of diatomaceous earth, 9 parts of sepiolite, 10 parts of cryolite, 7 parts of yttrium oxide, 13 parts of potassium feldspar, 11 parts of polyether-modified polydimethylsiloxane solution, and 6 parts of glaze additives.

[0067] The glaze additive includes the following components in parts by mass: 4 parts of phenol, 25 parts of water, and 12 parts of emulsifier.

[0068] The method for preparing the highly transparent white ceramic product comprises the following steps:

[0069] Step 1: Prepare high-transmittance white glaze

[0070] S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components;

[0071] The aging temperature is 36°C and the aging time is 5 days;

[0072] S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material;

[0073] The calcination temperature is 230° C. and the calcination time is 1 h;

[0074] S3, crushing the obtained calcined material and sieving it to obtain a screen material;

[0075] When sieving, pass through a 230-mesh sieve;

[0076] S4, ball milling the obtained screen material to obtain ball-milled material; the ball milling is carried out by water milling, with a ratio of ball:water:material=1:1.1:1, and the ball milling time is 1 day;

[0077] S5. Mix the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and add water to adjust the Baume degree to 44 to obtain a high-transparency white glaze;

[0078] Step 2: Glazing

[0079] Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product;

[0080] Step 3: Firing

[0081] The pre-fired product obtained in step 2 is fired in a firing kiln at 350°C for 1.2 hours, 750°C for 0.6 hours, 1160°C for 2.2 hours, and then 1060°C for 15 minutes. Finally, high-transmittance white ceramic products are obtained after natural cooling.

[0082] Example 4

[0083] A high-transmittance white ceramic product comprises a green body and a high-transmittance white glaze attached to the surface of the green body, wherein the high-transmittance white glaze comprises the following components in parts by mass: 58 parts of Longyan kaolin, 7 parts of coal gangue, 11 parts of talc, 14 parts of silicon dioxide, 16 parts of diatomaceous earth, 11 parts of sepiolite, 13 parts of cryolite, 8 parts of yttrium oxide, 15 parts of potassium feldspar, 11 parts of polyether-modified polydimethylsiloxane solution, and 6 parts of glaze additives.

[0084] The glaze additive includes the following components in parts by mass: 5 parts of phenol, 30 parts of water, and 11 parts of emulsifier.

[0085] The method for preparing the highly transparent white ceramic product comprises the following steps:

[0086] Step 1: Prepare high-transmittance white glaze

[0087] S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components;

[0088] The aging temperature is 38°C and the aging time is 4 days;

[0089] S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material;

[0090] The calcination temperature is 240° C., and the calcination time is 1.3 h;

[0091] S3, crushing the obtained calcined material and sieving it to obtain a screen material;

[0092] When sieving, pass through a 270-mesh sieve;

[0093] S4, ball milling the obtained screen material to obtain ball-milled material; the ball milling was carried out by water milling with a ratio of ball:water:material=1:1.2:1, and the ball milling time was 1.5 days;

[0094] S5. Mix the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and add water to adjust the Baume degree to 45 to obtain a high-transparency white glaze;

[0095] Step 2: Glazing

[0096] Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product;

[0097] Step 3: Firing

[0098] The pre-fired product obtained in step 2 is fired in a firing kiln at 380°C for 1.4 hours, 850°C for 1 hour, 1180°C for 2.4 hours, and then at 1080°C for 15 minutes. Finally, high-transmittance white ceramic products are obtained after natural cooling.

[0099] In the above four embodiments, the green body is all of the same type, and the green body includes the following components in parts by mass: 45-65 parts of calcined kaolin, 12-13 parts of potassium feldspar, 12-13 parts of sodium feldspar, 7-11 parts of talc, 10-13 parts of boric acid, 15-17 parts of silicon oxide, 7-9 parts of smoky quartz, 6-10 parts of magnesium tourmaline, 9-14 parts of dawsonite, 6-7 parts of schistose, and 11-13 parts of anthophyllite.

[0100] The calcined kaolin is obtained by calcining Longyan kaolin or other kaolin available on the market at 150-180° C. for 1-1.2 hours.

[0101] Specifically, in the above four embodiments, the formula ratios used are as follows:

[0102] The green body comprises the following components in parts by mass: 60 parts of calcined kaolin, 12 parts of potassium feldspar, 12 parts of sodium feldspar, 8 parts of talc, 11 parts of boric acid, 16 parts of silicon oxide, 8 parts of smoky quartz, 7 parts of magnesium tourmaline, 11 parts of dawsonite, 7 parts of schistose, and 12 parts of anthophyllite.

[0103] The calcined kaolin is obtained by calcining Longyan kaolin at 175° C. for 1 hour.

[0104] According to the mass fractions, the components are aged, crushed, sieved, ball-milled, and kneaded, and then the green body is obtained by using green body making equipment such as pressing and rolling.

[0105] The high-transmittance white ceramic products prepared by Examples 1 to 4 of the present invention were tested, wherein:

[0106] GB / T 3532-2009 daily-use porcelain standard was used to test the chromium and lead dissolution and glossiness of high-transparency white ceramic products;

[0107] The test results are shown in Table 1 below:

[0108] Table 1 Test results of high-transmittance white ceramic products

[0109]

[0110] As can be seen from Table 1, the highly transparent white ceramic products obtained in Examples 1 to 4 have low lead and chromium dissolution, reduce harm to the human body, have high gloss, and have a highly transparent white visual effect.

[0111] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A high-transmittance white ceramic product, characterized in that: The invention comprises a body and a high-transmittance white glaze attached to the surface thereof, wherein the high-transmittance white glaze comprises the following components in parts by mass: 51-63 parts of Longyan kaolin, 5-8 parts of coal gangue, 8-12 parts of talc, 12-14 parts of silicon dioxide, 16-18 parts of diatomaceous earth, 8-12 parts of sepiolite, 9-14 parts of cryolite, 6-9 parts of yttrium oxide, 12-16 parts of potassium feldspar, 11-12 parts of polyether-modified polydimethylsiloxane solution, and 5-7 parts of glaze additives; The glaze additive comprises the following components in parts by mass: 4-5 parts of phenol, 20-33 parts of water, and 11-13 parts of emulsifier; The method for preparing the highly transparent white ceramic product comprises the following steps: Step 1: Prepare high-transmittance white glaze S1. Aged the Longyan kaolin, coal gangue, talc, silicon dioxide, diatomite, sepiolite, cryolite, yttrium oxide, and potassium feldspar according to the mass fractions to obtain aged materials of the respective components; The aging temperature is 35-40°C, and the aging time is 4-5 days; S2. Mixing the aged materials of the various components obtained according to the mass fractions, and calcining them to obtain a calcined material; The calcination temperature is 200-250°C, and the calcination time is 1-1.5 hours. S3, crushing the obtained calcined material and sieving it to obtain a screen material; When sieving, pass through a 200-270 mesh screen; when ball milling in S4, use a water milling method for 1-1.5 days; S5 adjust the Baume degree to 43-45; S4, ball milling the obtained screen material to obtain ball mill material; S5. Mixing the obtained ball mill material, the polyether-modified polydimethylsiloxane solution, and the glaze additive according to the mass fractions, and adding water to adjust the Baume degree to prepare a high-transparency white glaze; Step 2: Glazing Preheating the formed body, and then glazing it, wherein the glaze is the high-transparency white glaze prepared in step 1, to obtain a pre-fired product; Step 3: Firing The pre-fired product obtained in step 2 is fired. The firing process is as follows: In the firing kiln, fire at 320~400℃ for 1~1.5h, fire at 700~870℃ for 0.5~1h, fire at 1150~1200℃ for 2~2.5h, then fire at 1050~1100℃ for 10~20min, and finally cool naturally to obtain high-transparent white ceramic products.

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